General Navigation USCG Question #1748 (Set 55)

Local sidereal time is equal to the __________.

Official USCG Answer & Rule Citation

Correct Answer: Option A — LHA of Aries

Local Sidereal Time (LST) is precisely defined in celestial navigation as the Local Hour Angle (LHA) of the First Point of Aries. According to Bowditch, since Aries serves as the origin for right ascension, its local hour angle directly equals local sidereal time.

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